wp-calypso/packages/components/src/gridicon/gridicons.d.ts

declare module 'gridicons/dist/util/icons-offset' {
	const iconsThatNeedOffset: string[];
	const iconsThatNeedOffsetX: string[];
	const iconsThatNeedOffsetY: string[];
}

declare module 'gridicons/svg-sprite/gridicons.svg' {
	const def: string;
	export = def;
}